<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>总结数据监视</title>
    <!-- 引入Vue -->
		<script type="text/javascript" src="../js/vue.js"></script>
        <style>
            button{
                margin-top:10px
            }
        </style>
</head>
<body>
     <div id ="root">
          <button @click="student.age++">年龄+1岁</button><br/>
          <button @click="addSex">添加性别属性,默认值,男</button>
          <button @click="student.sex = '未知' ">修改性别</button> <br/>
          <button @click="addFriend">在列表首位添加一个朋友</button> <br/>
          <button @click="updateFirstFriendName">修改第一个朋友的名字为：张三</button> <br/>
          <button @click="addHobby">添加一个爱好</button> <br/>
          <button @click="updateHobby">修改第一个爱好为：开车</button> <br/>
          <button @click="removeSmoke">过滤掉爱好中的抽烟</button> <br/>
          <h3>姓名:{{student.name}}</h3>
          <h3>姓名:{{student.age}}</h3>
          <h3 v-if="student.sex">性别：{{student.sex}}</h3>
        <h2>爱好</h2>
         <ul>
            <li v-for="(h,index) in student.hobby" :key="index">
                {{h}}
            </li>
         </ul>
        <h2>朋友们</h2>
        <ul>
            <li v-for="(f,index) in student.friends" :key="index">
                {{f.name}}--{{f.age}}
            </li>
        </ul>
    </div>
     <script type="text/javascript">
        Vue.config.productionTip = false //阻止 vue 在启动时生成生产提示。
        
        const cm = new Vue({
            el:'#root',
            data:{
                student:{
                    name:'tom',
                    age:'18',
                    hobby:['抽烟','喝酒','烫头'],
                    friends:[
                    {name:'jerry',age:35},
                    {name:'tony',age:36}
                    ]
                }
            },
            methods:{
                addSex(){
                    this.$set(this.student,'sex','男')
                },
                addFriend(){
                    this.student.friends.unshift({name:'jack',age:70})
                },
                updateFirstFriendName(){
                    this.student.friends[0].name = '张三'
                },
                addHobby(){
                    this.student.hobby.push('学习')
                },
                updateHobby(){
                    this.$set(this.student.hobby,0,'开车')
                },
                removeSmoke(){
                    this.student.hobby= this.student.hobby.filter((h)=>{
                        return h!=='抽烟'
                    })
                }
            }
        })
     </script>
</body>
</html>